Preheater for vapor stoves



Mah l, 1932. A, J, YEAGER 1,847,371 y PREHEATER FOR VAPOR STOVES Filed April 11. 1929 m j f, Y k ETT- i5 i *i J9 60 J7l 56 Z J9 J5 a' i mi; 17 l Z4 Z6 l 21 ZZ.

Z5 4? Q n 2,5 Z0 I fh' Q 1-1; Z7 e i J5 MI d) 43 i i/g Z i 1 i '.15 E 4 w Z l v y l l 9 j JZ x E *i Q iI 1f J6 J/ I Y Y v v 1 3+ Y 41 J7 i J6 QW Patented Mar. 1, 1932 UNITED. STATES ANTON J'. YEAGER, OF WISCONSIN RAPIDS, kWISCONSIN, ASSIGNOR TO PRENTISS^ WABERS PRODUCTS C0., OF WISCONSINk RAPIDS, WISCONSIN, A CORPORATION 'OIF WISCONSIN PREHEATER FOR VAPOR STOVES Application led April 11,

This invention relates to a new and improved preheater for vapor stoves and more particularly toa preheater which maybe instantaneously lighted and which gives a v vapor flame.

This inventionirelates t0 a -preheater for types of vapore stoveswhich utilize gasoline, or similar volatile fluids, as a fuel, and

vin which the gasoline is vaporizedl so that it lo may be burned in burners adapted for the OLI combustionv of gas. haverequired the provision of somemeans for preheating the generator of the stove, which generator serves .to vaporize the liquid fuel. y A Y Thevheating of the generator has been carried out in various ways upon starting'the stove, the generatorextending lacross one of Nthe burners so as tobe continuously heated *by such burner after the stove 1s put intoy operation. In starting the stoves, various devices have been used, such as generatlng cups located below. the generator valve which are adapted to receive liquid fuel which must be lighted to heat the generator before it is turned on to vdischarge vaporized fuel. In other forms of construction a small preheater generator valve has been provided, this being first heated by holding a match under it and its iiame then serving to preheat the large main generator valve. Any of these forms ofpconstructions have involved several steps by the user before the stove canbe put in operation, and they are not entirely satis- `factory for thisreason.

construction of this character which is simple indesign and adapted for commercial production. Y

Other and further objects will appear as the description proceeds.

Stoves of this character 23 which extends over the burner 24,and with 1929. Serial No. 354,215.

PATENT oFFl'c-E H I my invention somewhat diagrammatically the accompanying drawings,'in.which Figure 1 is a side elevation of a portion of. the assembly taken on line 1 -1of Figure 2;',

Figure 2 is a plan view of the assembly; Flgure 3 is a fragmentary section taken' on line 3 3 of Figure 2; andy Figurefi is a longitudinal'section of Ythemixingivalve. L l

In the drawings, the pressure tankllis provided with a filling cap 12andwith'a combinedy indicating meter 13 which is rovided with ascale n14 `and correspon ingH pointer to indicatetlie air pressure inthe tank, and with` a second scale 15 and corre- The handle 17 may be swung approximately o to an open position. It isn not used tocontrol the iow in amount, but merely to open and close the'fuel supply valve. The fuel pipe 18 leads from the valve 16 to the T- 19 from which the pipe 2O leads to the main gen` -erator valve 21. v

This generator valve may be of usualcon; struction and is provided with a control handle 22, with an intermediate tubular portion Vthe burner 24.' It willbe understood thatV other burners may be connected to the .dis, tributing pipe 27 and any suitable valves may be provided for controllingthe flow offuel tothe various burners. f Y

The pipe 28 also leads from the T 19-.and is connectedat .29 to the mixing valve 30.. This mixing valve kis provided with the con-f` trol handle 31 and is connected by pipe 32v to thet'opof the tank at 33. This pipe is- I have shown a preferred embodiment ofadaptedto lead compressed air from thejtank'v` .65 1 sponding pointer topindicate the quantity-'of which is shown in off position in Figure 2.-k

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' stem. The valve stem 36 is'provided with the valve shoulder 41 which seats afrainst a valve seat 42 formed in the member 3l The tubular member 43 connects the member 37 and the mixing passage 44. The valve stem 36 has a reduced extension 45 which extends` through the tubular member 43 and is provided with a needle-like projection 46 which passes through the discharge orifice in the end ofthe tubular member 43.

The mixing passage 44 is formed in a small casting'47 which is located under the tubular portion 23 of the main generator. fin orifice 48 is provided in the side of the casting 47 to admit additional air to be mixed With the fuel andV air from the reheated generator valve 35. This mixture'f will then pass up out o f opening 49 where it mav be instantly ignited. It Will then serve toheat the pre-y heater-valve tube 43 and also to heat the main A generator valve tube 23. The casting 47 and the' preheater valve casting 37 are shown as connected by a rod 50 which is threaded into the castings and serves to hold the structure rigidly together.A

The mixing valve 30 is shown in detail in cross section in Figure 4. The valve handle 31operatesthe valve stem 51 which is threaded into the valve member52 at 53. The valve stem 51 is surrounded by' packing` 54 held in place gland 55 to prevent pressure leakage. The valve shoulder 56 may be seated on the member 52 to close off flow of fuel through the pipe- 28 to the preheater valve 35. The needle-like extension 57 is provided on valve extending through the discharge orifice in the member 52. y

The air tube 32 secured to valve membei-"30 by the collar 58 and carries the plug 59 havinga small calibrated orifice 60 tocontrol the supply of compressed air to the mixing val-ve 30.

In the operation of the stove with this improved valve, the main generator valve 22 will be screwed in to close olf any discharge from such valve. The main fuel control valve 17 is then turned to the on position which will admit a flow of fuel through pipes 18' and 28 to the mixing valve 30. Air under pressure will also flow from the tank through pipe 32 to the mixing valve and into the preheater generator' valve body 37 through pipe 34. The air cannot How vfrom the preheater val-ve as'long as the shoulder 41 is held seated. The valve shoulder 56 is first unseated in the mixing valve and then the fuel will flow with the air to the preheater valve. The preheater valve is next unseated and the mixture of fuel and air flows from the preheater valve into the mixing passage 44. As soon as this starts to flow it may be lighted by placing a match or other' lighting means adjacent the discharge orifice 49. This willV cause a fiame at this point which will preheat the small preheater valve tube 43 to insure a proper continuance of the flame, and' will also serve to heat the main generator valve tube 23.

As soon as the tube 23 has been adequately heated the main generator valve 22 may be unscrewed to permit flow of fuel through the heated tube 23 where it will be va-porized and will pass down through the generating tube 26 and the distributing passages 27 to the burner 24. This burner may then be lighted and the mixing valve and the preheater generator valve may both be closed off.

This construction obviates the necessity for holding a match or other iame under the preheating valve and also avoids the necessity of having any cup or other receptacle withan openiiame of liquid fuel. The construction may be lighted by a match and the heater valve will'very quickly heat upv the mainY generator so that there will be veryl little delay in starting the main burners into operation.

While l have shown in detail one form vofy construction for carrying out my invention, this is to be understood as illustrative only as it may be carried out by other structures and in other ways, and I contemplatey such changes and modifications as come within the spirit and scope cf the appended claims.

I claim:

1. 'A vapor stove construction, comprising a pressure fuelV tank, a main generator valve, a burner adjacent the generator valve, a fuel supply connection between the fuel tank and main generator valve, ay preheater generator valve located below the main generator valve, a mixing valve for supplying a mixture of fuel and air from said pressure fuel tank to said preheater valve, an open connection between the air under pressure in the fuel tank and the mixing valve, and means for control'- ling the flow of fuel to the mixing valve.

2. A preheater for vapor stoves, comprising a preheater tube and valve, a mixing valve for supplying a mixture of fuel and air to said preheater valve, a connectionbetween the mixing ,valve and preheater valve, a fuel 

